Threadless bolt and nut assembly



Feb. 14, 1939. L. BARRETT 2,147,080

THREADLESS BOLT AND NUT ASSEMBLY Filed July 29, 1937 AlToRNEYs memo Feb.15 1939 UNITED} s'iAT- s -PATENT..,OFFICE This invention relates to athreadless bolt and -nut assembly and has for an object to provide aquick action device which 'will be devoid of threads or cotter'pins andwill requireno tools to apply or remove. a

Afurther object is to provide a device in which the nut is locked to the.bolt by a sin le solid key which may be applied or removed by manualmovement of the nut against the pressure of a spring housed in the nut.I

A further object is to provide a device of this character which will beformed of only four simple parts, which will be inexpensive tomanufacture, and which will not easily get out of order.

a With the above and other objects in view the invention consists ofcertain novel details of construction and combinations of partshereinafter fully described and claimed, it being understood thatfurther modifications may be resorted .to

within the scope of the appended claim'without departing from the spiritor sacrificing any of advantages of the invention.

In the accompanying drawing forming part of thisspeciflcation,

Figure 1 is a side elevation of a threadless bolt and nutassemblyconstructed in accordance with the invention, the nut beingshown in section.

' Figure 2 is a top plan view of the device shown in Figure 1 andshowing parts broken away to ex- 30 flange of the nut.

Figure 3 is.a view similarto Figure 2 but showing the parts in separatedcondition.

l 'igureiisacrosssectionalviewtakenonthe.

linel-lofmgure2.

' 35 Referring nowto the drawin in which like 0 face of the opposite andsmooth. An opening I! is formed transversely of the last named end ofethe bolt.

A solid metal cylindrical key it is adapted to beslidendwise through theopening II. The k y is providedron one side, atboth'ends. with cut awayportions ll which produce shoulders I. 1

A smooth bore cap nut I. of substantially the same diameter as the bolt,is provided with a cylindrical flange il provided at diametrically op 50posite points with openings I! which are adapted toaiignwiththeopeningl2 oitheboltandpermit insertion of the key It endwise through the boltandthroushthenuttolockthenutagainst pose the interlocking shoulders ofthe key and spring is substantially conical in contour and when expandedextends to about the-openings" I! of the cap nut. In use the springtends constantly to force ,the nut longitudinally awayfrom the bolt andthereby hold the flange I! of the bolt 5 fitted in the cut away portionsll of the key in which position of the parts the shoulders I! engage theinner cylindrical suriace of the nut at the flange and positivelyprevent the key being dislodged endwisein either direction from apl0plied position. i

It is simply necessary to manually move the nut i6 longitudinally of thebolt to compress the spring I9 sufllciently to dislodge the lockingshoulders l5 from engagement-with the inner surface of the nut whereuponthekey may be removed endwise to separate the nut from the bolt. Toapply the nut and key the nut is placed on the bolt and its openings i8are aligned with the opening I! in the bolt and during such movement gothe spring I! is compressed against the end of the bolt. The key I3 isnow slid endwise through the opening l2 of the bolt and openings l8 ofthe nut whereupon the pressure on the nut may be released to permit thespring to expand and withdraw the nut ii to lodge the flange l1 thereofin the cut away portions ll of the key and engage the locking shouldersI! of the key with the inner surface of the nut.

From the above description it is thought that the construction andoperation of the invention will be fully understood without furtherexplanation.

What is claimed is:

A threadless bolt and nut assembly comprising '35 a bolt having a headatone end and having the opposite end formed smooth and cylindrical,there 5 being an opening disposed transversely in said cylindrical endand opening through. the sides thereof, a cap having a cylindricalflange pro 4o vided at diametrically opposite'points in the side withopenings adapted to register withthe open,- ing in the bolt when thebolt is telescoped into the cap, a cylindrical key of less diameter thanthe diameter of the opening in the bolt having the ends cut away on oneside to provide shoulders, said key being insertable endwise through thealigned openings in the flange of the cap and in the -bolt,'and ahelical spring having a base 0011- volution secured in said cap at theclosed end 5 thereof and having the free and adapted to exert pressureupon said bolt and tend to force the nut awayfrom the bolt to move saidshoulders into engagement with the inner face of the cylindrical flangeof the nut and lock the bolt against accidental endwise dislodgment.

- V L. RABBI-T1.

